Fault Analysis of the Blue Nile Grid
Fault Analysis of the Blue Nile Grid
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Date
2015-04-26
Authors
Ibrahim, Amir Widaa
Journal Title
Journal ISSN
Volume Title
Publisher
UOFK
Abstract
The National Grid of Sudan (NG) was developing and facing significant and numerous changes
in its topology and generation levels over the years. Reinforcements such as the 110KV
Khartoum ring, additional transformers, uprating of old equipment and new power stations
contribute to the increase in fault levels at all system busbars. As most of the switchgear and
busbar ratings pertain to the early fault level calculations, it becomes necessary to undertake
new fault levels analysis. This is helpful in ascertaining safe operation of the system and
determining upgrading or changes in topology where required.
In this study, a fault analysis programme was developed which enables study of all type of faults
on the system busbars, with the aid of the programme, a complete fault level assessment of the
NG was undertaken on the 220, 110, 33 and 11KV levels.
The fault levels were found to exceed switchgear ratings in some cases and recommendations
for limiting the fault currents are proposed.
It is also noteworthy to mention that in the past, fault calculations were undertaken by Foreign
Consultants while this programme enable NEC to carry out fault investigations whenever and
wherever required.
Description
102 page
Keywords
Fault,Analysis,Blue Nile,Grid